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Netting C++: Mapping Native C++ to the Common Type System

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

This month Stanley Lippman begins translating the Text Query Language Query class hierarchy from C++ to the .NET Common Type System.

Stanley B. Lippman

MSDN Magazine February 2007

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Netting C++: The Design Space of the Common Type System


Stanley Lippman moves Text Query Language to the Microsoft .NET Framework using the C++/CLI language extensions in Visual C++ 2005.

Stanley B. Lippman

MSDN Magazine December 2006

No mapping exists from object type System.Xml.Linq.XDocument to a known managed provider native type



I am using XML in getting client data in 3-tier architecture, using XDocument in passing XML among layers.

But when I use it in inserting this XML in XDocument, it throws the following error:

No mapping exists from object type System.Xml.Linq.XDocument to a known managed provider native type. 

I am using the following code, it throws the exception at the bold line:

 public void DALInsertXML(XDocument x)
            SqlConnection connection = new SqlConnection(connection1);
            _command = ne

No mapping exists from object type System.Web.UI.WebControls.Label to a known managed provider nativ

 I'm making the leap to move from vb.net to C#, and I'm getting this crazy error when I try to execute one sp, set a value, and then execute another sp based on the value.   Any suggestions??? proc_GetSectionDetails is my first stored procedure.  From that, I get a value for SectionID, and then use it for the second sp called  proc_GetSectionDetails protected void getSectionContent() { SqlConnection conn = default(SqlConnection); SqlCommand comm = default(SqlCommand); SqlDataReader reader = default(SqlDataReader); string connectionString = ConfigurationManager.ConnectionStrings["123"].ConnectionString; conn = new SqlConnection(connectionString); comm = new SqlCommand(); comm.Connection = conn; comm.CommandType = System.Data.CommandType.StoredProcedure; comm.CommandText = "proc_GetSectionDetails"; comm.Parameters.AddWithValue("SubSectionID", Request.QueryString["SubSectionID"]); conn.Open(); reader = comm.ExecuteReader(); if (reader.Read()) { lblName.Text = Convert.ToString(reader["SubSectionName"]); lblDesc.Text = Convert.ToString(reader["SubSectionDescription"]); Label SubSectionParentID = new Label();

System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPerm


Good Day all,

Having an issue with an outside user accessing my IIS7 box. I do not have this problem when running the website from my host machine. I found this post: Http://forums.asp.net/t/1371394.aspx. I assure you that this is not a solution because I am not storing any of my files on a network share. 

What do you think my approach should be. 

I already have read rights to IIS user to my BIN folder. 

Thanks for the help. 

The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must



This is frustrating, and I don't know how to solve it.

I have a strange problem. I am adding a LinqDatasource object, and set the context:

        protected void LinqDataSource_ContextCreating(object sender, LinqDataSourceContextEventArgs e)
            e.ObjectInstance = new KaruselaDataContext(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);

Then I get this error:
The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.Linq, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089'.


On web.config I already have this:
<add assembly="System.Data.Linq, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>

NOTE: The datacontext is in a different project (DLL proect) where I added a refernce to System.Data.Linq.

is there another way adding a refernce to a web project? or only though teh web.config?


Netting C++: Mapping Templates to Generics


In this installment, Stanley Lippman continues to port his ISO-C++ Text Query Language application to the Microsoft .NET Framework and C++/CLI.

Stanley Lippman

MSDN Magazine April 2007

Can't Commit?: Volatile Resource Managers in .NET Bring Transactions to the Common Type


Here Juval Lowy discusses the benefits you'll get when you implement transactions in your non-database applications, with a little help from volatile resource managers in the .NET Framework 2.0.

Juval Lowy

MSDN Magazine December 2005

XML in Yukon: New Version Showcases Native XML Type and Advanced Data Handling


The next version of Microsoft SQL Server, code-named "Yukon," represents quite a few steps forward in the evolution of XML integration. Yukon supports native storage of XML data using the XML data type, which makes it possible to run native queries on XML data using the emerging industry standard XQuery language. Data integrity of the XML data type can be enforced through schema validation and XML-based check constraints, and special indexes can be defined that help speed up queries. In addition, Yukon has the built-in ability to expose its data through Web services. This article discusses these and other XML features of Yukon.

Bob Beauchemin

MSDN Magazine February 2004

Types in Yukon: Managed UDTs Let You Extend the SQL Server Type System


The next version of SQL Server, code-named "Yukon," will offer enhanced support for user-defined types (UDTs). Because UDTs can be managed by the CLR, you can represent a wide variety of data structures to create types not possible with previous versions of SQL Server. With UDTs you can more precisely control the kind of data your type accepts, resulting in better data management. This article explores UDTs in "Yukon" and covers their design and implementation.

Peter W. DeBetta

MSDN Magazine February 2004

Unable to cast object of type 'System.Web.Mvc.ValueProviderResult' to type 'System.IConvertible'


 Why am I getting this error on line:

               sp.Price = Convert.ToDecimal(collection.GetValue("Price"));

sp is :
  SPecials_Templates sp = new SPecials_Templates();

SPecials_Templates Defined:

    public partial class SPecials_Templates
        public class SPecials_TemplatesMetaData

            public object Key { get; set; }
            public object Template_Name { get; set; }
            public object Headline { get; set; }

An unhandled exception of type 'System.Net.Sockets.SocketException' occurred in system.dll

Additional information: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respondThis error occurs when i was executing a vc++.net program implementing ICMP....Error occurs when executing this statement... iRet=st->ReceiveFrom(RecvByte,RecvByte->Length,SocketFlags::None,&senderRemote);How to solve this problem????

System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlCli

I have created a windows library control that accesses a local sql database I tried the following strings for connecting Dim connectionString As String = "Data Source=localhost\SQLEXPRESS;Initial Catalog=TimeSheet;Trusted_Connection = true" Dim connectionString As String = "Data Source=localhost\SQLEXPRESS;Initial Catalog=TimeSheet;Integrated Security=SSPI"   I am not running the webpage in a virtual directory but in C:\Inetpub\wwwroot\usercontrol and I have a simple index.html that tries to read from an sql db but throws the error System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)   at System.Security.PermissionSet.Demand()   at System.Data.Common.DbConnectionOptions.DemandPermission()   at System.Data.SqlClient.SqlConnection.PermissionDemand()   at System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection)   at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, etc etc  The action that failed was:DemandThe type of the first permission that failed was:System.Data.SqlClient.SqlClientPermissionThe Zone of the assembly that fa

A first chance exception of type 'System.ArgumentException' occurred in System.Windows.Forms.dll

I've read a bit about this error and maybe I have nothing to worry about.  BUT ... my simple little app gets 7 of these before it even gets to the first Dim statement in the Class Form1!  I found and followed instructions on how to have the Debugger intercept these exceptions but it seems that they are not being intercepted.  I only know that they have happened because of the messages in the Immediate Window.  In the Designer all I have is 5 Labels and 5 TextBoxes.   Any thoughts on how I could get to the cause of these messages? Thanks,  Bob

Prompt "The proper type library could not be found in the system registry" when open SQL2008 Express

Hi folks, I just format my notebook and installed the Win7Pro Eng 32-bit version and then install the SQL2008Express. I restarted my notebook as usual after the installation and open the SQL SMS, it prompt the following error "The proper type library could not be found in the system registry", It's a big dialog with certain text saying I do not have permission...etc. Since, I am using administrator account to open the program already but still fail. I have to repaire the SQL SMS too. May I know any other I can check? Any comment is highly appreciated. Thank you very much! Regards, Tony  

The type or namespace name 'Linq' does not exist in the namespace 'System'

Hi, I uploaded my website to the server, and I have there a working with wcf - it should be fw 3.5 I saw that fw 3.5 is installed on the server and also we have there fw 3.0 sp1. I run my website : www.qenglishcenter.com and I'm getting an error : The type or namespace name 'Linq' does not exist in the namespace 'System' (are you missing an assembly reference?) shouldn't System.linq be already existed ? Thanks for any reply.  

How to convert System.Type to Data.DbType?

Hi,Is it possible to convert a System.Type to Data.DbType (this is unfortunately an enumaeration)?Thanks, Rainer.

The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception.

 Hi all,When i run my project on my own computer, it works fine. But when i deploy it to server, it gives me this error. I can run my other dts and sp, but i get this error on this.. The type initializer for 'System.Data.SqlClient.SqlConnection' threw an exception. I googled it but could not find a solution. How can i solve this problem? 
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